A Strapless, Backless, Seamless One Piece Bra without Waterproofing And Manufacturing Method Thereof

ABSTRACT

Disclosed is a strapless backless seamless adhesive brassiere without waterproofing and a manufacturing method thereof, in which an inner layer, an intermediate layer and an outer layer are sequentially laminated, adhered together using an adhesive agent, heat-pressed in a one-piece form, and then cut in a shape of brassiere cups and an adhesive region using ultrasonic waves, after which adhesiveness is applied only to the adhesive region of the brassiere other than brassiere cups to attach the brassiere to the skin of a wearer, wherein the adhesive layer uniformly infiltrates to a depth of about ½ of the thickness of the intermediate layer through the inner layer and is securely fixed using a solidification process through rapid cooling or high-temperature treatment. A dam is formed at an edge of the adhesive layer so that the adhesive layer is neither shoved nor squashed by external force, or an adhesive surface requiring adhesiveness is provided in a discontinuous form including a net or lattice form so as to ensure air permeability.

TECHNICAL FIELD

The present invention relates to a strapless backless seamless adhesivebrassiere without waterproofing and a manufacturing method thereof, andmore particularly to a strapless backless seamless adhesive brassierewithout waterproofing and a manufacturing method thereof, in which aninner layer, an intermediate layer and an outer layer are sequentiallylaminated, adhered together using an adhesive agent between respectivelayers, heat-pressed in a one-piece form, and then cut in a shape ofbrassiere cups and an adhesive region using ultrasonic waves, afterwhich adhesiveness is applied only to the adhesive region of thebrassiere other than brassiere cups to attach the brassiere to the skinof a wearer, wherein the inner layer and the outer layer are made ofwoven fabric such as cloth to ensure air permeability, and the adhesiveagent uniformly infiltrates to a depth of about ½ of a thickness of theintermediate layer through the inner layer and is securely fixed thereinusing a solidification process through rapid cooling or high-temperaturetreatment. Also, a dam may be formed on a portion corresponding to theedge of the adhesive layer so that the adhesive layer is neither shovednor squashed by external force, or an adhesive surface requiringadhesiveness may be provided in a discontinuous form for example a netform or a lattice form so as not to reduce air permeability due to theadhesive layer. Further, in order to coordinate a typical adhesive layerand an air permeable adhesive layer, the dam may be defined by adecorative figure or letter, and thus the air permeable adhesive layeris formed inside the dam and the typical adhesive layer outside the dam.

BACKGROUND ART

Generally, women consider the breasts as the most important bodyportion. Also, every woman wants to have well-rounded and beautifulbreasts, in both the East and the West. The breasts of women symbolizebeauty and also are regarded as the sensitive portion used to breastfeeda baby. Recently, almost all of the strapless functional brassiereswidely use direct adhesion to attach themselves to the breasts of thewoman. Women wear such brassieres several times out of curiosity, butsuffer from some problems and thus avoid the use thereof.

To gain beautiful breasts, women may undergo a breast enlargementoperation or may continue wearing such adhesive brassieres. Taking intoconsideration not only commercial reasons but also stability in additionto the function of the brassieres to cover the breasts of the womanwhich are the most sensitive body portion, the development of brassiereswhich are convenient and substantially usable is required.

The strapless adhesive brassiere, part or all of which is made of wovenfabric and which includes an adhesive layer, are variouslyfunctionalized and developed in a manner such that the adhesive layer isformed on the inner surface of the brassiere cups and both cups areconnected using hooks or the like. Examples thereof are disclosed inKorean Patent Nos. 10-0504184, 10-0765822 and 10-0567817, Korean UtilityModel Nos. 20-0363463, 20-0337986 and 20-338007, and U.S. Pat. Nos.6,397,391 and 5,755,651.

In the brassieres according to the above conventional techniques,because the adhesive agent is mainly applied on the inner surface of thebrassiere cups and is directly adhered to the breasts of a wearer, womenwho breastfeed a baby evade the use thereof.

U.S. Pat. Nos. 6,814,648, 6,257,952, 5,755,611 and 6,231,424 B1 andPCT/US00/02436 disclose techniques in which, in lieu of theaforementioned brassiere in which the adhesive layer is formed on theinner surface of the brassiere cups, the brassiere is provided in aone-piece form through sewing, after which the adhesive layer is formedon one surface of a waterproof film such as TPU and is then attached tothe wings of the brassiere through sewing or using double-sided tape.

In particular, in U.S. Pat. Nos. 6,814,648 and 6,231,424 B1 andPCT/US00/02436, the adhesive layer is not directly applied to thebreasts of a wearer but the silicone adhesive agent is applied onto theurethane waterproof film at the wings of the brassiere made of wovenfabric and is then completed through sewing. So, the brassiere thusobtained spoils the beauty and negatively impacts the sensation ofwearing them due to projection of a seam line and an edge line. Also,when a wearer wears such a brassiere and then a tight outer garment, theedge line and the seam line are visible through the garment and projectfrom the garment, undesirably deteriorating an external appearance.Moreover, the manufacturing process of such a brassiere becomescomplicated, thus increasing the manufacturing expenses, resulting inreduced competitiveness.

Almost all brassiere products according to the above conventionaltechniques adopt the silicone adhesive agent. In some cases, an acrylicadhesive agent or a polyolefin adhesive agent may be applied. In eithercase, the adhesive agent is present in a liquid phase at either roomtemperature or hotter, except for special cases, and thus may infiltratethe brassiere when applied to the woven fabric. In order to prevent suchinfiltration, there have been proposed methods of using a waterprooffilm such as TPU upon lamination of the brassiere cups and so on, or ofsubjecting the surface of the woven fabric for brassieres towaterproofing and then applying the adhesive agent thereto.

However, these methods are problematic because the film such as TPU isformed, thus making it impossible to induce air permeability of thebrassiere even through partial application of the adhesive layer. Asdisclosed in Korean Patent No. 10-0765822, even upon the use of thewaterproof film such as TPU and then partial application of the adhesivelayer, it is technically impossible to induce air permeability of thebrassiere unless air holes are formed in the brassiere.

As mentioned above, the adhesive layer should be applied on the wovenfabric after the waterproof film such as TPU is applied or the surfaceof the woven fabric is subjected to waterproofing. In this case, tostably apply the silicone adhesive agent on the TPU, a surfactant(primer) is first applied on the TPU and thus treated so that thesilicone adhesive agent is efficiently combined with the surface of theTPU, after which the adhesive agent is applied. The surfactant which iscomposed of highly volatile materials may irritate the skin of thewearer. Unless the primer is used, the silicone adhesive agent cannot bestably securely fixed on the surface of the TPU. Even if the adhesiveagent is securely fixed through primer treatment, the silicone adhesiveagent intrinsically has weak adhesive force and thus cannot be reusedfor a long period of time (about a maximum of 100 reuses) and has nodurability and thus cannot be washed using a washing machine togetherwith general brassieres.

Also, in the case where a TPU is laminated with the woven fabric orsponge and then molded at high temperature to thus produce molded cups,the TPU may be anticipated to break down but such guessing may beconfirmed only when using the adhesive agent. In short, work efficiencyis reduced and defective rates are increased.

DISCLOSURE Technical Problem

Accordingly, the present invention has been made keeping in mind theabove problems occurring in the related art, and an object of thepresent invention is to provide a strapless backless seamless adhesivebrassiere without waterproofing and a manufacturing method thereof, inwhich an adhesive layer is applied on part or all of the adhesive regionof the brassiere other than the brassiere cups.

Another object of the present invention is to provide a straplessbackless seamless adhesive brassiere without waterproofing and amanufacturing method thereof, in which a seam line or an edge line isnot formed on the adhesive region of the brassiere, and thus theadhesive layer may be brought into close contact with the skin of awearer, and also a protrusion due to the wearing of the brassiere is notvisible from the outside, thus preventing the degradation of an externalappearance.

A further object of the present invention is to provide a straplessbackless seamless adhesive brassiere without waterproofing and amanufacturing method thereof, in which surface waterproofing using TPUis not conducted upon application of an adhesive agent to form anadhesive layer.

Yet another object of the present invention is to provide a straplessbackless seamless adhesive brassiere without waterproofing and amanufacturing method thereof, in which an adhesive layer is neitherdeformed nor removed upon repetitive use or washing of the brassiere.

Still another object of the present invention is to provide a straplessbackless seamless adhesive brassiere without waterproofing and amanufacturing method thereof, in which air permeability may be exhibitedwithout using additional air holes.

Technical Solution

According to a first aspect of the present invention, a straplessbackless seamless adhesive brassiere without waterproofing includes anadhesive layer so that the brassiere is directly attached to a skin of awearer without shoulder and back straps, wherein the adhesive layer isformed on part or all of an adhesive region of the brassiere, other thanbrassiere cups shaped to match breasts of the wearer. The adhesiveregion may include a mid portion for connecting a pair of brassierecups, a breast portion extending from the mid portion to both sidesthereof to support and uplift the brassiere cups, and a wing portionextending from the breast portion to both sides thereof to correspond toan underarm area of the wearer, and the adhesive layer may be formed onat least one selected from among the mid portion, the breast portion andthe wing portion.

In the adhesive brassiere, the brassiere cups and the adhesive regionmay be provided in a one-piece form, and the brassiere including thebrassiere cups and the adhesive region may include an inner layer, anouter layer, and an intermediate layer disposed between the inner layerand the outer layer. The inner layer and the outer layer may be made ofcloth or woven fabric, and the inner layer may be made of microfiberfabric having a fiber diameter of 0.01 mm or less and a small cell sizeso that an adhesive agent for the adhesive layer is not easily absorbedinto the brassiere. Particularly useful is nylon or polyester wovenfabric for the inner layer. The intermediate layer may be made of anyone selected from among nonwoven fabric, sponge, and urethane elasticfibers.

The adhesive layer may infiltrate part of the intermediate layer throughthe inner layer as viewed from a cross-section and may be securely fixedtherein. Specifically, the adhesive layer may infiltrate to a depth of ½or less of a thickness of the intermediate layer as viewed from across-section and may be securely fixed therein, and may include anadhesive agent including silicone, acryl, polyolefin or a mixturethereof, each of which is solidified through rapid cooling orhigh-temperature treatment depending on the properties thereof.

The polyolefin adhesive agent may uniformly infiltrate to apredetermined depth and may be securely fixed using a solidificationprocess through cooling, and the solidification process through coolingmay be conducted by performing rapid cooling immediately after theadhesive agent dissolved at high temperature is applied into the innerlayer and the intermediate layer, without using TPU or additionalwaterproofing, thus solidifying the adhesive agent. Alternatively, thesilicone adhesive agent may be solidified through high-temperaturetreatment.

Further, a dam having a width of 1˜5 mm and a height of 0.3˜2 mm may beformed at an edge of the adhesive layer so that the adhesive layerapplied to the brassiere is not deformed. The dam may be made of asynthetic resin including silicone, acryl or polyolefin, which is thesame component as that of the adhesive layer but has no adhesivecomponent, and may have a density greater than that of the adhesivelayer so as to have strength not less than that of the adhesive layer.The dam may be formed using a solidification process through rapidcooling or using a solidification process through high-temperaturetreatment depending on the properties of the synthetic resin.

The adhesive layer may be provided in the form of an air permeableadhesive layer which is securely fixed in a linear form including a netform or a lattice form onto a surface requiring adhesiveness in order toensure air permeability, and the air permeable adhesive layer may beformed inside the dam having a decorative figure or letter shape.

According to a second aspect of the present invention, a method ofmanufacturing a strapless backless seamless adhesive brassiere without aneed for waterproofing includes sequentially laminating an inner layer,an intermediate layer, and an outer layer using an adhesive, thusforming a brassiere fabric sheet, pressing the brassiere fabric sheet athigh temperature, thus processing the brassiere fabric sheet into aone-piece form, fusing and cutting the processed brassiere fabric sheetusing ultrasonic waves, thus completing the brassiere having brassierecups shaped to match a breast shape and an adhesive region to beattached to the skin of a wearer, and forming an adhesive layer on partor all of the adhesive region of the brassiere.

In the above method, forming the adhesive layer may be conducted using asolidification process through rapid cooling or using a solidificationprocess through high-temperature treatment so that the adhesive layerinfiltrates to a predetermined depth of the intermediate layer throughthe inner layer and is securely fixed therein. As such, thesolidification process through rapid cooling may be conducted byperforming rapid cooling immediately after an adhesive agent dissolvedat high temperature is applied into the inner layer and the intermediatelayer, without a need for additional waterproofing, and thesolidification process through high-temperature treatment may beconducted by heating an adhesive agent in a liquid phase from roomtemperature to a high temperature and solidifying the adhesive agent.

The inner layer may be made of nylon or polyester microfiber fabrichaving a small cell size such that the adhesive agent for the adhesivelayer is not easily absorbed into the brassiere, the intermediate layeris made of nonwoven fabric or sponge, and the adhesive layer may be madeof an adhesive agent including silicone, acryl or polyolefin.

The above method may further include forming a dam at a portioncorresponding to an edge of the adhesive layer so that the adhesivelayer is not shoved by external force, before forming the adhesivelayer. The dam may be made of a synthetic resin including silicone,acryl or polyolefin, may have strength not less than that of theadhesive layer, and may be securely fixed through rapid cooling orhigh-temperature treatment.

In the above method, forming the adhesive layer may be conducted byforming an air permeable adhesive layer in a linear form on a surfacerequiring adhesiveness so as to ensure air permeability and thensubjecting the adhesive layer in a linear form to solidification throughrapid cooling or high-temperature treatment so that the adhesive layerinfiltrates to a predetermined depth and a predetermined width of theintermediate layer through the inner layer and is securely fixedtherein. The air permeable adhesive layer may be securely fixed in alinear intersection form, including a net form or a lattice form. Inparticular, the air permeable adhesive layer maybe formed inside the damhaving a decorative figure or letter shape.

In the above method, forming the adhesive layer or forming the dam maybe conducted through a liquid crystal dispensing process for dispensingan adhesive agent in a liquid crystal state using a nozzle fordispensing liquid crystals, and then a liquid crystal cooling processfor rapidly cooling liquid crystals of the adhesive agent immediatelyafter being dispensed using a nozzle for cooling liquid crystals whichis disposed adjacent to the nozzle for dispensing liquid crystals sothat a direction of movement of the nozzle for dispensing liquidcrystals coincides with a direction of movement of the nozzle forcooling liquid crystals.

According to a third aspect of the present invention, a straplessbackless seamless adhesive brassiere without waterproofing includes anadhesive layer so that the brassiere is directly attached to a skin of awearer without shoulder and back straps, wherein the adhesive layer isformed on an adhesive region of the brassiere other than brassiere cupsso that the adhesive layer is not directly attached to breasts of thewearer which are a most sensitive body portion of a woman, the brassiereincluding the brassiere cups and the adhesive region is made of wovenfabric in order to ensure air permeability throughout the brassiere, andthe brassiere cups and the adhesive region are provided in a one-pieceform.

The adhesive layer may be directly formed on the woven fabric withoutwaterproofing, and, in order to control flowability of a resin includingsilicone, acryl or polyolefin in a liquid crystal state applied on thewoven fabric, the liquid crystals may be solidified and securely fixedthrough rapid cooling within 1˜2 sec immediately after being dispensed.In order to control a speed for passing the resin through the wovenfabric, the woven fabric may be made of nylon or polyester microfibershaving a diameter of 0.01 mm or less, and a particle size of the resinis not smaller than the fiber diameter of the woven fabric. The adhesivelayer may be provided in a linear form; including a net form or alattice form, so as not to reduce air permeability due to the adhesivelayer. Also, a dam having a width of 1˜5 mm and a height of 0.3˜2 mm maybe formed at an edge of the adhesive layer using a resin includingsilicone, acryl or polyolefin having a density greater than that of theadhesive layer, in order to prevent the adhesive layer from being shovedor squashed.

According to a fourth aspect of the present invention, a method ofmanufacturing a strapless backless seamless adhesive brassiere without aneed for waterproofing, which is made of a woven fabric to ensure airpermeability and has an adhesive layer without shoulder and back straps,includes forming the adhesive layer through a liquid crystal dispensingprocess, the liquid crystal dispensing process including dispensingliquid crystals of an adhesive agent for the adhesive layer using anozzle for dispensing liquid crystals so that the liquid crystals areapplied on the woven fabric, and, then performing a liquid crystalcooling process for rapidly cooling the liquid crystals immediatelyafter being dispensed using a nozzle for cooling liquid crystals whichis disposed adjacent to the nozzle for dispensing liquid crystals sothat a direction of movement of the nozzle for dispensing liquidcrystals coincides with a direction of movement of the nozzle forcooling liquid crystals, in order to securely fix and solidify thedispensed liquid crystals without waterproofing the woven fabric.

The liquid crystal dispensing process may include dissolving apolyolefin resin at high temperature, thus forming liquid crystals,supplying the liquid crystals through pumping into the nozzle fordispensing liquid crystals, dispensing the liquid crystals from thenozzle for dispensing liquid crystals while a position thereof is setusing an infrared point sensor, and then forming a predetermined lineusing a computer program. The speed for cooling the liquid crystals maybe determined by a distance between the nozzle for cooling liquidcrystals and the nozzle for dispensing liquid crystals and by a speed ofmovement of the nozzle, and a temporal interval between dispensing ofliquid crystals and cooling of liquid crystals may not exceed 2 sec.

According to a fifth aspect of the present invention, a method ofmanufacturing a strapless backless seamless adhesive brassiere without aneed for waterproofing, which is made of a woven fabric to ensure airpermeability and has an adhesive layer without shoulder and back straps,includes forming the:adhesive layer through a transfer process, thetransfer process including attaching an adhesive agent composed of asilicone resin on release paper, bringing the release paper into closecontact with the woven fabric so that the adhesive agent of the releasepaper and the woven fabric face each other, performing pressing whileapplying heat to a surface of the release paper opposite a surface onwhich the adhesive agent is applied, and absorbing the adhesive agentinto the woven fabric to thus solidify and securely fix the adhesiveagent.

Advantageous Effects

According to the present invention, the brassiere can exhibit thefollowing effects.

First, an adhesive layer is formed only on the adhesive region of thebrassiere other than the brassiere cups, thus obviating a need forshoulder or back straps to attach the brassiere to the skin of a wearer,thereby improving convenience for a wearer.

Second, because the adhesive region of the brassiere has neither theseam line nor the edge line, the adhesive layer formed on the innerlayer of the brassiere can be brought into close contact with the skinof the wearer without interference, and also the outer layer of thebrassiere has neither a protrusion nor a seam and thus such a protrusionis not visible from the outside, thereby satisfying the expectations ofthe wearer.

Third, additional TPU or waterproofing is not conducted to, form theadhesive layer, thus reducing the manufacturing costs and simplifyingthe manufacturing process.

Fourth, because the contour of the adhesive layer is protected by a dam,the shape of the adhesive layer can be maintained without change evenwhen shoved or squashed through repetitive use of the adhesive layer.Even upon washing of the brassiere, there is no worry about the removalof the adhesive layer, thus generating economic benefits.

Fifth, the adhesive layer can be provided in a net form or a latticeform, and thus there is no need for additional air holes for airpermeability, thereby improving competitiveness.

DESCRIPTION OF DRAWINGS

FIG. 1 is a rear perspective view showing the configuration of anadhesive brassiere according to a first embodiment of the presentinvention;

FIG. 2 is a rear view showing the configuration of the adhesivebrassiere according to the first embodiment of the present invention;

FIG. 3 is a partially enlarged cross-sectional view showing theconfiguration of a brassiere having a typical adhesive layer accordingto a second embodiment of the present invention

FIG. 4 is a rear view showing the configuration of the brassiere havinga typical adhesive layer according to the second embodiment of thepresent invention

FIG. 5 is a rear view showing the configuration of a brassiere having anair permeable adhesive layer according to a third embodiment of thepresent invention

FIG. 6 is a partially enlarged cross-sectional view showing theconfiguration of the brassiere having an air permeable adhesive layeraccording to the third embodiment of the present invention

FIG. 7 is a rear view showing the configuration of a brassiere in whicha typical adhesive layer coordinates with an air permeable adhesivelayer according to a fourth embodiment of the present invention

FIG. 8 is a perspective view showing a process of laminating the layersof the brassiere fabric sheet according to the present invention;

FIG. 9 is a perspective view showing a process of pressing the brassierefabric sheet according to the present invention;

FIG. 10 is a perspective view showing a process of cutting the brassierefabric sheet according to the present invention

FIG. 11 is a perspective view showing a process of forming a dam of thebrassiere according to the present invention;

*51 FIG. 12 is a perspective view showing a process of forming theadhesive layer of the brassiere according to the present invention; and

FIG. 13 is a flowchart showing a process of manufacturing the adhesivebrassiere according to the present invention.

* Description of the Reference Numerals in the Drawings * 100: brassiere110: brassiere cup 120: adhesive region 122: mid portion 124: breastportion 126: wing portion 132: inner layer 134: outer layer 136:intermediate layer 150: adhesive layer 160: dam 170: air permeableadhesive layer 180: nozzle for cooling liquid crystals 190: nozzle fordispensing liquid crystals

MODE FOR INVENTION

Hereinafter, a detailed description will be given of a straplessbackless seamless adhesive brassiere without waterproofing and a methodof manufacturing the same according to embodiments of the presentinvention with reference to the appended drawings.

As shown in FIGS. 1 and 2, the brassiere 100 according to an embodimentof the present invention is a strapless backless adhesive brassierewhich may be directly attached to the skin of a wearer using only anadhesive layer without using shoulder and back straps. To this end, thebrassiere 100 includes an adhesive layer 150 formed on an adhesiveregion 120 other than the brassiere cups 110 shaped to match the breastshape. The adhesive region 120 of the brassiere includes a mid portion122 for connecting a pair of brassiere cups 110, a breast portion 124extending from the mid portion to both sides thereof to support anduplift the brassiere cups 110, or a wing portion 126 extending from thebreast portion to both sides thereof to correspond to the underarm areaof a wearer. The adhesive layer 150 may be formed on at least oneselected from among the mid portion 122, the breast portion 124 and thewing portion 126.

In this way, because the adhesive agent is not applied on the innersurface of the brassiere cups 110 in a concave shape but is applied onlyonto the adhesive region 120 which is planar, the adhesive agent is notdirectly applied to the breasts of a woman which are the most sensitivebody portion, thus preventing the inconvenience of a woman whobreastfeeds a baby and realizing a simplified manufacturing process,reduced manufacturing costs and mass production.

The brassiere including the brassiere cups 110 and the adhesive region120 is composed of an inner layer 132 and an outer layer 134 which aremade of woven fabric, and an intermediate layer 136 disposed between theinner layer and the outer layer. The intermediate layer 136 is made ofnonwoven fabric sponge, silk, urethane elastic fibers and other types ofcloth. In particular, any material may be applied thereto as long as airpermeability is ensured. The woven fabric includes various types ofcloth, and the inner layer 132 and the outer layer 134 need not be madeof the same type of cloth. In the case of the inner layer 132, it may beformed of microfiber fabric having a relatively small cell size so thatan adhesive agent used for the adhesive layer 150 is not easily absorbedinto the brassiere, specifically the intermediate layer 136.Particularly useful is nylon or polyester woven fabric. As such, themicrofiber indicates very fine fiber having a diameter of about 1/100thof the thickness of a strand of hair. When the diameter of microfibersis set to about 0.008˜0.025 mm (the diameter should be set to at least0.01 mm), water molecules may cause the gaps between microfibers to besmaller than the particles of the adhesive solution, and thusflowability of the solution passing through the microfiber fabric may beeasily controlled and also high-temperature durability is high,advantageously preventing the deformation of the brassiere uponapplication of the adhesive agent at high temperature.

In this way, when the inner layer 132 is made of nylon or polyesterwoven fabric, a phenomenon in which the adhesive agent passes throughthe inner layer 132 and, infiltrates the intermediate layer 136 may beappropriately controlled, and further, the pollution of the outer layer134 due to the excessive infiltration of the adhesive agent may beprevented.

In order to provide the brassiere 100 composed of the inner layer 132,the outer layer 134 and the intermediate layer 136 in a one-piece form,the inner layer 132, the intermediate layer 136, and the outer layer 134are laminated in that order, adhered to each other using an adhesiveagent therebetween, and then pressed at high temperature, thus obtaininga brassiere fabric sheet. The brassiere fabric sheet thus obtained isfused and cut using ultrasonic waves, thereby completing a desiredbrassiere 100.

In this way, when the brassiere including the brassiere cups 110 and theadhesive region 120 is processed in a one-piece form through pressingand then cut using ultrasonic waves, an edge line or a seam line is notformed. Thereby, problems in which the adhesive layer 150 is lifted fromthe skin of a wearer due to the edge line or seam line formed on theinner layer 132 and thus the adhesive layer 136 does not adhere well tothe skin of a wearer may be solved. Also, problems in which a protrusionor seam due to the edge line or seam line formed on the outer layer 134of the brassiere may be visible through or projected from a tight outergarment which is worn by a wearer may be solved.

Additionally, wires (not shown) may be further provided at a boundaryline between the brassiere cups 110 and the adhesive region 120 so thatthe breasts are lifted and placed closer together. The wire may beinserted between the inner layer and the intermediate layer or betweenthe intermediate layer and the outer layer, and is made of a shapememory alloy, plastic or a mixture thereof.

*70 The adhesive layer 136 of the present invention is formed so thatthe adhesive agent infiltrates only to a depth of about ⅓˜½ of thethickness of the intermediate layer 136 provided between the inner layer132 and the outer layer 134 as viewed from the cross-section and issecurely fixed therein, as shown in FIG. 3. The adhesive layer 150 isformed using an,adhesive agent such as silicone, acryl or polyolefin. Ifthe adhesive agent infiltrates to a depth exceeding ½ of the thicknessof the intermediate layer, it passes through the intermediate layer madeof sponge or the like to thus pollute the outer layer 134. Conversely,if the adhesive agent infiltrates to a depth less than the range of ⅓˜½of the thickness of the intermediate layer, the adhesive layer 150 isnot efficiently attached to the brassiere, thus losing adhesiveness.

Silicone is a thermoplastic synthetic resin having a siloxane bond (Si—Obond) in which silicon and oxygen are alternately disposed and hasapplicability adequate for use as a release agent and is physiologicallyharmless and is therefore useful as the adhesive agent of the brassiere.The polyolefin resin which is a polymer compound resulting frompolymerization of olefin is the lightest plastic, having a density ofabout 0.83, and has high heat resistance even at high temperature andsuperior transparency, and is thus suitable for use as the adhesiveagent of the present invention.

In order to control the infiltration of the adhesive agent only to adesired depth of the intermediate layer 136, although the inner layer132 may be made of microfibers having small cells as mentioned above, aprocess of adjusting the viscosity of the adhesive agent in a liquidphase to thus control the degree of absorption thereof is regarded asmore important.

To this end, a solidification process through rapid cooling orhigh-temperature treatment is particularly useful. The solidificationprocess through rapid cooling includes performing rapid coolingimmediately after the adhesive agent dissolved at high temperature isapplied into the brassiere, thus solidifying the adhesive agent.Specifically, the adhesive agent in a solution state is allowed to passthrough the inner layer 132 at a predetermined rate, but is controlledto prevent the leakage out of the outer layer 134 through the sponge. Itis important that the adhesive agent be controlled to be uniformlyapplied at a predetermined rate. The solidification process throughhigh-temperature treatment includes solidifying the adhesive agentpresent in a liquid state at room temperature while being heated to hightemperature.

In the case of the polyolefin resin, solidification is conducted in sucha manner that heat is applied to polyolefin resin which is present in asolid state at room temperature, thus dissolving the resin in a hot meltstate, and then the dissipating heat to the surroundings. Accordingly,the solidification of the polyolefin resin needs a procedure for coolingthe polyolefin applied onto the woven fabric. Also, in the case of thesilicone adhesive agent, a hydrogen-based silicone polymer A containinga platinum catalyst and vinylic silicone polymer B are mixed together,cross-linked at room temperature and then solidified. In this case, acooling procedure is required. In contrast, there is illustrated asilicone resin which is present in a liquid state and is then solidifiedupon heating to high temperature. In this case, high temperaturetreatment is essentially required. Under certain circumstances, asolidification accelerator may be used. Below, the solidificationprocess through rapid cooling using polyolefin resin is described, andthe case of the high-temperature treatment is also described but is thesame in terms of securely fixing the adhesive agent throughsolidification as the above solidification process through rapidcooling.

Conventionally, a waterproofing process using TPU has been mainly usedto prevent the leakage of the adhesive agent through the outer layer134. However, the present invention does not additionally require suchwaterproofing and is thus preferable in terms of products and workprocesses. As mentioned above, because the adhesive agent is typicallypresent in a liquid phase, the adhesive agent completely infiltrates thecloth upon application onto the cloth, thus making it impossible to formthe adhesive layer on the surface of the cloth. For this reason, thereis an essential need for waterproofing the cloth using a primer beforethe adhesive agent is applied on the cloth. For example, a process ofadhering TPU or thermoplastic resin on the inner surface of cloth or ofsubjecting cloth itself to waterproofing has been employed.

Alternatively, in order to solidify and securely fix the adhesive agent,a transfer process may be used. This process includes applying anadhesive agent on release paper to be separated, attaching the releasepaper to the woven fabric so that the adhesive agent applied on therelease paper and the woven fabric face each other, pressing the releasepaper while applying heat to the surface of the release paper oppositethe surface on which the adhesive agent is applied, thus absorbing theadhesive agent into the woven fabric, and then separating the releasingpaper from the woven fabric, thereby obtaining the woven fabric on whichthe adhesive agent is applied as in a printing process.

The adhesive layer 150, which is applied on part or all of the midportion, the breast portion and the wing portion, may be shoved orsquashed by physical force due to repetitive use of the brassiere orwashing thereof. Also, the adhesive layer 150 attached to the innerlayer of the brassiere may come apart therefrom and thus may be exposedto the outside. For example, a phenomenon in which the adhesive layer150 is squashed or shoved due to the use of the brassiere may occur. Inparticular, when the adhesive layer 150 is shoved from the wing portionof the brassiere, the adhesive agent may adhere to another piece ofunderwear or clothing. Further, while the adhesive agent is shoved outof the brassiere, adhesiveness is lost, and the adhesive agent appearsas a mess.

Thus, according to another embodiment of the present invention, as shownin FIGS. 3 and 4, a dam 160 may be formed at the edge of the adhesivelayer 150. The dam 160 is applied on the brassiere before formation ofthe adhesive layer on the brassiere, and may be formed in the samemanner as in the process of forming the adhesive layer. Specifically,the dam is made along the edge of a portion corresponding to theadhesive layer before formation of the adhesive layer, provided that thedam has the same strength as that of the adhesive layer or is increasedin density to thus be stronger compared to the adhesive layer. Also, thedam is made of the same component as in the adhesive layer, providedthat silicone, acrylic or polyolefin synthetic resin having no adhesivecomponent is used.

Thus, when the dam is first formed and then the adhesive layer isformed, the adhesive agent is applied inside the dam and thus it is easyto form the adhesive layer 150. Hence, even though the adhesive layerthus formed is subjected to external force, the adhesive layer 150 isneither shoved nor damaged. The dam 160 is formed in the width range of1˜5 mm and in the height range of 0.3˜2 mm. The height of the adhesivelayer 150 which is the same as or similar to that of the dam 160 may bedesirably set to about 3 mm, and may have a density to such an extent asto not hurt the skin of the wearer.

According to a further embodiment of the present invention, as shown inFIGS. 5 and 6, there is provided a brassiere which is air permeable evenwithout forming additional air holes for preventing air permeabilityfrom being reduced attributable to the adhesive layer 150. The adhesivelayer 150 may be adjusted in terms of an area as viewed from above, aswell as in terms of the cross-sectional depth. Specifically, an airpermeable adhesive layer 170 which is not applied on the entire surfacerequiring adhesiveness when viewed from above may be provided in adiscontinuous form, for example, a net form or a lattice form. In thisway, when the air permeable adhesive layer 170 is applied in a net formor a lattice form, air may freely pass through the portion on which theadhesive layer was not applied, thus improving air permeability.

Also, the adhesive layer may be used in a combination of the adhesivelayer 150 and the air permeable adhesive layer 170. As shown in FIG. 7,decorative figures or letters may be formed in the adhesive layer 150,170. The dam 160 may be defined by the letter or figure, and the airpermeable adhesive layer 170 is formed inside the dam 160, therebyappropriately coordinating the typical adhesive layer with the latticetype adhesive layer, making an external appearance beautiful andimproving air permeability. Even in this case, to form the air permeableadhesive layer 170 into a desired shape, the solidification processthrough rapid cooling may be utilized.

Below, the process of manufacturing the strapless backless seamlessadhesive brassiere without a need for waterproofing is described indetail with reference to the appended drawings. As mentioned above, thesolidification process includes rapid cooling, high-temperaturetreatment, or transfer. For convenience, the rapid cooling process isillustratively described.

As shown in FIG. 8, the inner layer 132, the intermediate layer 136, andthe outer layer 134 are laminated in that order, after which theselayers are adhered together using the adhesive agent therebetween andthen pressed at high temperature using a pressing system, such as apress, as shown in FIG. 9. As such, the brassiere cups 110 are formed ina concave shape, and the other portion is formed flat. As shown in FIG.10, the pressed fabric sheet is cut into a desired shape usingultrasonic waves, thus obtaining the brassiere having the brassiere cups110 and the adhesive region 120.

As shown in FIGS. 11 and 12, the dam 160 and the adhesive layer 150 areformed in the adhesive region 120 of the inner layer 132 of thebrassiere. The process of forming the dam and the adhesive layer is asfollows. Specifically, the dam 160 may be formed through a liquidcrystal dispensing process or a silk screening process. Herein, theliquid crystal dispensing process is described below. According to theliquid crystal dispensing process, the dam 160 is formed in a desiredshape as if a picture is drawn with a line using a nozzle 190 dispensingliquid crystals. This process includes dissolving silicone, acryl orpolyolefin resin at high temperature, thus obtaining liquid crystals,supplying the liquid crystals into the nozzle 190 through pumping,dispensing the liquid crystals from the nozzle 190 while the positionthereof is set using an infrared point sensor, and then forming adesired shape using a computer program, thus forming the dam 160. Also,in the case where the adhesive layer 150 is provided in a linear formsuch as a net form or a lattice form, it may be formed in a desiredshape using the above process through movement of the nozzle 190.

By the solidification process through rapid cooling, the liquid crystalsmay be cooled using a nozzle 180 for cooling liquid crystals immediatelyafter being dispensed from the nozzle 190 for dispensing liquidcrystals. For example, the nozzle 180 for cooling liquid crystals isspaced apart from the nozzle 190 for dispensing liquid crystals by apredetermined distance so that the direction of movement of the nozzle180 for cooling liquid crystals coincides with the direction of movementof the nozzle 190 for dispensing liquid crystals. Thereby, immediatelyafter the liquid crystals are dispensed, they can be rapidly cooled. Assuch, rapid cooling indicates cooling within about 1˜2 sec without delay(in the case of natural cooling at room temperature, 30˜60 sec isrequited), and may be determined by the distance between the nozzle 180for cooling liquid crystals and the nozzle 190 for dispensing liquidcrystals and the speed of movement of the nozzle. In this way, when thedispensed liquid crystals are rapidly cooled, the depth where theadhesive agent infiltrates downward can be uniformly controlled, and aswell, the lateral infiltration of the adhesive agent is prevented,whereby the adhesive layer can be formed at a desired width and adesired interval.

As mentioned above, in the present invention, in order to solve problemsof the conventional brassiere made of only the woven fabric in which thedissolved adhesive agent may pollute the outer surface of the brassiereupon formation of the adhesive layer on the inner surface of thebrassiere and also in which various defects may occur due towaterproofing using TPU or primer treatment, the solidification processthrough rapid cooling is used so that the adhesive agent uniformlyinfiltrates only to a depth of about ½ of the thickness of the spongelayer and is thus securely fixed therein. Although the preferredembodiments of the present invention have been disclosed forillustrative purposes, those skilled in the art will appreciate thatvarious modifications, additions and substitutions are possible, withoutdeparting from the scope and spirit of the invention as disclosed in theaccompanying claims.

1. A strapless backless seamless adhesive brassiere withoutwaterproofing, comprising an adhesive layer so that the brassiere isdirectly attached to a skin of a wearer without shoulder and backstraps, wherein the adhesive layer is formed on part or all of anadhesive region of the brassiere, other than brassiere cups shaped tomatch breasts of the wearer.
 2. The adhesive brassiere according toclaim 1, wherein the adhesive region comprises a mid portion forconnecting a pair of brassiere cups, a breast portion extending from themid portion to both sides thereof to support and uplift the brassierecups, and a wing portion extending from the breast portion to both sidesthereof to correspond to an underarm area of the wearer, and theadhesive layer is formed on at least one selected from among the midportion, the breast portion and the wing portion.
 3. The adhesivebrassiere according to claim 1 or 2, wherein the brassiere cups and theadhesive region are provided in a one-piece form, and the brassiereincluding the brassiere cups and the adhesive region comprises an innerlayer, an outer layer, and an intermediate layer disposed between theinner layer and the outer layer.
 4. The adhesive brassiere according toclaim 3, wherein the inner layer and the outer layer are made of clothor woven fabric.
 5. The adhesive brassiere according to claim 4, whereinthe inner layer is made of microfiber fabric having a fiber diameter of0.01 mm or less and a small cell size so that an adhesive agent for theadhesive layer is not easily absorbed into the brassiere.
 6. Theadhesive brassiere according to claim 5, wherein the inner layer is madeof nylon or polyester woven fabric.
 7. The adhesive brassiere accordingto claim 6, wherein the intermediate layer is made of any one selectedfrom among nonwoven fabric, sponge, and urethane elastic fibers.
 8. Theadhesive brassiere according to claim 3, wherein the adhesive layerinfiltrates part of the intermediate layer through the inner layer asviewed from a cross-section and is securely fixed therein.
 9. Theadhesive brassiere according to claim 8, wherein the adhesive layerinfiltrates to a depth of ½ or less of a thickness of the intermediatelayer as viewed from a cross-section and is securely fixed therein. 10.The adhesive brassiere according to claim 8, wherein the adhesive layercomprises an adhesive agent including silicone, acryl, polyolefin or amixture thereof, each of which is solidified through rapid cooling orhigh-temperature treatment depending on properties thereof.
 11. Theadhesive brassiere according to claim 10, wherein a polyolefin adhesiveagent uniformly infiltrates to a predetermined depth and is securelyfixed using a solidification process through cooling, and thesolidification process through cooling is conducted by performing rapidcooling immediately after the adhesive agent dissolved at a hightemperature is applied into the inner layer and the intermediate layer,without using TPU or additional waterproofing, thus solidifying theadhesive agent.
 12. The adhesive brassiere according to claim 8, whereinthe adhesive layer is made of a silicone adhesive agent, and theadhesive agent is solidified through high-temperature treatment.
 13. Theadhesive brassiere according to claim 11, wherein a dam having a widthof 1˜5 mm and a height of 0.3˜2 mm is formed at an edge of the adhesivelayer so that the adhesive layer applied to the brassiere is notdeformed.
 14. The adhesive brassiere according to claim 13, wherein thedam is made of a synthetic resin including silicone, acryl orpolyolefin, which is a same component as that of the adhesive layer buthas no adhesive component, and has a density greater than that of theadhesive layer so as to have strength not less than that of the adhesivelayer.
 15. The adhesive brassiere according to claim 13, wherein the damis formed using a solidification process through rapid cooling or usinga solidification process through high-temperature treatment depending onproperties of the synthetic resin.
 16. The adhesive brassiere accordingto claim 11, wherein the adhesive layer is provided in a form of an airpermeable adhesive layer which is securely fixed in a linear formincluding a net form or a lattice form onto a surface requiringadhesiveness in order to ensure air permeability.
 17. The adhesivebrassiere according to claim 16, wherein the air permeable adhesivelayer is formed inside the dam having a decorative figure or lettershape.
 18. A method of manufacturing a strapless backless seamlessadhesive brassiere without a need for waterproofing, the methodcomprising: sequentially laminating an inner layer, an intermediatelayer, and an outer layer using an adhesive agent, thus forming abrassiere fabric sheet pressing the brassiere fabric sheet at a hightemperature, thus processing the brassiere fabric sheet into a one-pieceform and fusing and cutting the processed brassiere fabric sheet usingultrasonic waves, thus completing the brassiere having brassiere cupsshaped to match a breast shape and an adhesive region to be attached toa skin of a wearer.
 19. The method according to claim 18, furthercomprising forming an adhesive layer on part or all of the adhesiveregion of the brassiere.
 20. The method according to claim 19, whereinthe forming the adhesive layer is conducted using a solidificationprocess through rapid cooling or using a solidification process throughhigh-temperature treatment so that the adhesive layer infiltrates to apredetermined depth of the intermediate layer through the inner layerand is securely fixed therein.
 21. The method according to claim 20,wherein the solidification process through rapid cooling is conducted byperforming rapid cooling immediately after an adhesive agent dissolvedat a high temperature is applied into the inner layer and theintermediate layer, without a need for additional waterproofing, and thesolidification process through high-temperature treatment is conductedby heating an adhesive agent in a liquid phase from room temperature toa high temperature and solidifying the adhesive agent.
 22. The methodaccording to claim 21, wherein the inner layer is made of nylon orpolyester microfiber fabric having a small cell size such that theadhesive agent for the adhesive layer is not easily absorbed into thebrassiere.
 23. The method according to claim 21, wherein theintermediate layer is made of nonwoven fabric or sponge.
 24. The methodaccording to claim 21, wherein the adhesive layer is made of an adhesiveagent including silicone, acryl or polyolefin.
 25. The method accordingto claim 19, further comprising forming a dam at a portion correspondingto an edge of the adhesive layer so that the adhesive layer is notshoved by external force, before forming the adhesive layer.
 26. Themethod according to claim 25, wherein the dam is made of a syntheticresin including silicone, acryl or polyolefin, has strength not lessthan that of the adhesive layer, and is securely fixed through rapidcooling or high-temperature treatment.
 27. The method according to claim19, wherein the forming the adhesive layer is conducted by forming anair permeable adhesive layer in a linear form on a surface requiringadhesiveness so as to ensure air permeability and then subjecting theadhesive layer in a linear form to solidification through rapid coolingor high-temperature treatment so that the adhesive layer infiltrates toa predetermined depth and a predetermined width of the intermediatelayer through the inner layer and is securely fixed therein.
 28. Themethod according to claim 27, wherein the air permeable adhesive layeris securely fixed in a linear intersection form, including a net form ora lattice form.
 29. The method according to claim 28, wherein the airpermeable adhesive layer is formed inside the dam having a decorativefigure or letter shape.
 30. The method according to claim 27, whereinthe forming the adhesive layer or the forming the dam is conductedthrough a liquid crystal dispensing process for dispensing an adhesiveagent in a liquid crystal state using a nozzle for dispensing liquidcrystals, and then a liquid crystal cooling process for rapidly coolingliquid crystals of the adhesive agent immediately after being dispensedusing a nozzle for cooling liquid crystals which is disposed adjacent tothe nozzle for dispensing liquid, crystals so that a direction ofmovement of the nozzle for dispensing liquid crystals coincides with adirection of movement of the nozzle for cooling liquid crystals.
 31. Astrapless backless seamless adhesive brassiere without waterproofing,comprising an adhesive layer so that the brassiere is directly attachedto a skin of a wearer without shoulder and back straps, wherein theadhesive layer is formed on an adhesive region of the brassiere otherthan brassiere cups so that the adhesive layer is not directly attachedto breasts of the wearer which are a most sensitive body portion of awoman, the brassiere including the brassiere cups and the adhesiveregion is made of woven fabric in order to ensure air permeabilitythroughout the brassiere, and the brassiere cups and the adhesive regionare provided in a one-piece form.
 32. The adhesive brassiere accordingto claim 31, wherein the adhesive layer is directly formed on the wovenfabric without waterproofing, and, in order to control flowability of aresin including silicone, acryl or polyolefin in a liquid crystal stateapplied on the woven fabric, the liquid crystals are solidified andsecurely fixed through rapid cooling within 1˜2 sec immediately afterbeing dispensed.
 33. The adhesive brassiere according to claim 32,wherein the woven fabric is made of nylon or polyester microfibershaving a diameter of 0.01 mm or less, and a particle size of the resinis not smaller than the fiber diameter of the woven fabric, in order tocontrol a speed for passing the resin through the woven fabric.
 34. Theadhesive brassiere according to claim 33, wherein the adhesive layer isprovided in a linear form, including a net form or a lattice form, so asnot to reduce air permeability due to the adhesive layer.
 35. Theadhesive brassiere according to claim 34, wherein a dam having a widthof 1˜5 mm and a height of 0.3˜2 mm is formed at an edge of the adhesivelayer using a resin including silicone, acryl or polyolefin having adensity greater than that of the adhesive layer, in order to prevent theadhesive layer from being shoved or squashed.
 36. A method ofmanufacturing a strapless backless seamless adhesive brassiere without aneed for waterproofing, which is made of a woven fabric to ensure airpermeability and comprises an adhesive layer without shoulder and backstraps, the method comprising forming the adhesive layer through aliquid crystal dispensing process, the liquid crystal dispensing processincluding dispensing liquid crystals of an adhesive agent for theadhesive layer using a nozzle for dispensing liquid crystals so that theliquid crystals are applied on the woven fabric.
 37. The methodaccording to claim 36, further comprising performing a liquid crystalcooling process for rapidly cooling the liquid crystals immediatelyafter being dispensed using a nozzle for cooling liquid crystals whichis disposed adjacent to the nozzle for dispensing liquid crystals sothat a direction of movement of the nozzle for dispensing liquidcrystals coincides with a direction of movement of the nozzle forcooling liquid crystals, in order to securely fix and solidify thedispensed liquid crystals without waterproofing the woven fabric. 38.The method according to claim 37, wherein the liquid crystal dispensingprocess comprises dissolving a polyolefin resin at a high temperature,thus forming liquid crystals, supplying the liquid crystals throughpumping into the nozzle for dispensing liquid crystals, dispensing theliquid crystals from the nozzle for dispensing liquid crystals while aposition thereof is set using an infrared point sensor, and then forminga predetermined line using, a computer program.
 39. The method accordingto claim 38, wherein a speed for cooling the liquid crystals isdetermined by a distance between the nozzle for cooling liquid crystalsand the nozzle for dispensing liquid crystals and by a speed of movementof the nozzle, and a temporal interval between dispensing of liquidcrystals and cooling of liquid crystals does not exceed 2 sec.
 40. Amethod of manufacturing a strapless backless seamless adhesive brassierewithout a need for waterproofing, which is made of a woven fabric toensure air permeability and comprises an adhesive layer without shoulderand back straps, the method comprising forming the adhesive layerthrough a transfer process, the transfer process including attaching anadhesive agent composed of a silicone resin on a release paper, bringingthe release paper into close contact with the woven fabric so that theadhesive agent of the release paper and the woven fabric face eachother, performing pressing while applying heat to a surface of therelease paper opposite a surface on which the adhesive agent is applied,and absorbing the adhesive agent into the woven fabric to thus solidifyand securely fix the adhesive agent.